Phenolic Caps are the premier closure in the packaging business. The Phenolic Cap is a threaded closure with an uninterrupted spiral mechanism. This provides the user the ability to easily seal and reseal the container. The ribbed sided design provides easy gripping for the user to twist on and off. This cap has a smooth top. The main benefit of Phenolic Caps is their durability and long life. As a result they are a more premium priced product